Enriquez said Nunez admitted to the threat saying he wrote it because of the Arpaio's stance on illegal immigration.

In February, a Scottsdale man, Ignacio Carbajol was arrested by Sheriff's deputies for a threat made in January of this year. Carbajol admitted to detectives that the death threats he made against the Sheriff were also because of Arpaio's stance on illegal immigration. Carbajol's threat read, "He should see the color of his skin and where he comes from…stupid mother******…let's kill him. I will kill him for free. I am going to Arizona to kill that a*****."

In April, a mail bomb addressed to Arpaio was intercepted by postal workers in Flagstaff, Arizona. Officials say a federal investigation into this situation is on-going.